#!/usr/bin/env python
from .helpers import urlopen


def application(environ, start_response):
    status = '200 OK'
    response_headers = [('Content-type', 'text/plain')]
    write = start_response(status, response_headers)
    write('Hello World!')
    return ['']


def test(webapp):
    f = urlopen(webapp.server.http.base)
    s = f.read()
    assert s == b'Hello World!'
    assert f.headers.get('Transfer-Encoding') == 'chunked'